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OpenStudy (anonymous):
a ball is thrown downward from the top of a 140-foot building with an initial velocity of 17 feet per second. The height of the ball h after t seconds is given by the equation h= -16t^2 - 17t + 140. How long after the ball is thrown will it strike the ground?
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OpenStudy (zale101):
plug this 0= -16t^2 - 17t + 140 in quadratic formula
OpenStudy (zale101):
|dw:1383783356135:dw|
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